Estimates for the number of people at Sunday's rally varied from several hundred thousand to two million.

On Saturday, the government criticised Twitter, saying the US-based social media company had failed to abide by hundreds of court orders to remove content deemed illegal.

The social media ban has been circumvented and mocked, but Erdogan has remained resolute in the face of opposition from the public and even the Turkish president, Abdullah Gul, who earlier on Sunday had described the ban as "an unpleasant situation for such a developed country as Turkey".

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Geert Wilders Lauds Legal Project

"Last June, I was acquitted of all charges by an Amsterdam court. The Middle East Forum's Legal Project ... was always there to help, advise and assist ... The importance of the MEF's Legal Project in reclaiming free expression and political discourse ... cannot be overestimated."